https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99245
--- Comment #1 from Alexander Lelyakin <alexander.lelyakin at googlemail dot
com> ---
There is a shorter sequence:
g++ -std=c++20 -fmodules-ts -x c++-system-header typeinfo
g++ -std=c++20 -fmodules-ts -x c++-system-header ostream
----
/usr/local/include/c++/11.0.1/ostream: internal compiler error: in
write_cluster, at cp/module.cc:14605
0x6e2d18 module_state::write_cluster(elf_out*, depset**, unsigned int,
depset::hash&, unsigned int*, unsigned int*)
../../gcc/gcc/cp/module.cc:14605
0xa634de module_state::write(elf_out*, cpp_reader*)
../../gcc/gcc/cp/module.cc:17785
0xa640cf finish_module_processing(cpp_reader*)
../../gcc/gcc/cp/module.cc:19922
0x9f776b c_parse_final_cleanups()
../../gcc/gcc/cp/decl2.c:5175
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
----
g++ (GCC) 11.0.1 20210228 (experimental)
